Correct handling of arrays with callbacks in the prototype chain.

src/x64/ic-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 591 matching lines @@
   // rax: value
   // rbx: receiver's elements array (a FixedArray)
   // rcx: index
   // rdx: receiver (a JSArray)
   // r9: map of receiver
   if (check_map == kCheckMap) {
     __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
     __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
     __ j(not_equal, fast_double);
   }
+
+  // HOLECHECK: guards "A[i] = V"
+  // We have to go to the runtime if the current value is the hole because
+  // there may be a callback on the element
+  Label holecheck_passed1;
+  __ movq(kScratchRegister, FieldOperand(rbx,
+                                         rcx,
+                                         times_pointer_size,
+                                         FixedArray::kHeaderSize));
+  __ CompareRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
+  __ j(not_equal, &holecheck_passed1);
+  __ JumpIfDictionaryInPrototypeChain(rdx, rdi, kScratchRegister, slow);
+
+  __ bind(&holecheck_passed1);
+
   // Smi stores don't require further checks.
   Label non_smi_value;
   __ JumpIfNotSmi(rax, &non_smi_value);
   if (increment_length == kIncrementLength) {
     // Add 1 to receiver->length.
     __ leal(rdi, Operand(rcx, 1));
     __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
   }
   // It's irrelevant whether array is smi-only or not when writing a smi.
   __ movq(FieldOperand(rbx, rcx, times_pointer_size, FixedArray::kHeaderSize),
@@ skipping 19 matching lines @@
   __ ret(0);
 
   __ bind(fast_double);
   if (check_map == kCheckMap) {
     // Check for fast double array case. If this fails, call through to the
     // runtime.
     // rdi: elements array's map
     __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
     __ j(not_equal, slow);
   }
+
+  // HOLECHECK: guards "A[i] double hole?"
+  // We have to see if the double version of the hole is present. If so
+  // go to the runtime.
+  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
+  __ cmpl(FieldOperand(rbx, rcx, times_8, offset), Immediate(kHoleNanUpper32));
+  __ j(not_equal, &fast_double_without_map_check);
+  __ JumpIfDictionaryInPrototypeChain(rdx, rdi, kScratchRegister, slow);
+
   __ bind(&fast_double_without_map_check);
   __ StoreNumberToDoubleElements(rax, rbx, rcx, xmm0,
                                  &transition_double_elements);
   if (increment_length == kIncrementLength) {
     // Add 1 to receiver->length.
     __ leal(rdi, Operand(rcx, 1));
     __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
   }
   __ ret(0);
 
@@ skipping 1017 matching lines @@
   Condition cc = (check == ENABLE_INLINED_SMI_CHECK)
       ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
       : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64